Add new routine to check waiting count

Add new routine to check waiting count

If some API's return value is come lately from muse server after waiting timeout, api_activating can be true.
Then, previous return value is returned if same API is called.
This patch resolves it.

[Version] 0.2.48
[Profile] Common
[Issue Type] Update
[Dependency module] N/A
[Test] [M(T) - Boot=(OK), sdb=(OK), Home=(OK), Touch=(OK), Version=tizen-3.0-mobile_20161213.3]

Change-Id: I5a2f3bb7ea034f74aa3815fde12bbcd4c4132e8f
Signed-off-by: Jeongmo Yang <jm80.yang@samsung.com>